Folding knife



FIG. 1 is a perspective view of a folding knife, showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is an enlarged view of the claimed area of FIG. 1 .

The broken lines depict portions of the folding knife in which the design is embodied that form no part of the claimed design. 

CLAIM We claim the ornamental design for a folding knife, as shown and described. 